QSqlTableModel : SetQuery issue

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I basically want to filter as I am entering route no in my lineedit. I have connected the lineedit valuechanged signal to a slot where I have written the above code.
If not this way then what is the way to do that?

p3c0

@Antweb Shouldn't you use like when using % ? I'm not sure why it is crashing but since you want some realtime filtering its better to use QSortFilterProxyModel here. Checkout the examples Qt installed directory on your system.

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I used like and the command is working if I call it in the constructor. But when I am calling in the slot connected to my valuechanged of lineedit it crashes. And I want to reduce the size of my table with each added character. I don't think that is possible with QSortFIlterProxyModel.

p3c0

@Antweb OfCourse it is possible. You just have to re-implement filterAcceptsRow and put a condition as to what should be displayed. You have to just connect the textchanged signal to a slot where you will update the text using filterRegExp. Check the filtering subtopic for more details.

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Done. Thank you.

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I am able to filter my QSqlTableModel with the help of text in lineedit. If simultaneously i want to filter the same table from selection in a combobox. How can i do that. Will I need a separate QSortFIlterProxyModel? Also i want the text selected from combobox to filter this QSqlTableModel on the basis of another Column.

This is my code right now:

QSqlTableModel *model = new QSqlTableModel(this, db);
model->setTable("path_master_table");
model->setEditStrategy(QSqlTableModel::OnManualSubmit);
model->select();

QSortFilterProxyModel *proxyModel = new QSortFilterProxyModel(this);
proxyModel->setSourceModel(model);

ui->tableView->setModel(proxyModel);
connect(ui->lineEdit, SIGNAL(textChanged(QString)), proxyModel, SLOT(setFilterRegExp(QString)));

Thanks.

p3c0

@Antweb

If simultaneously i want to filter the same table from selection in a combobox. How can i do that. Will I need a separate QSortFIlterProxyModel?

No. Separate QSortFIlterProxyModel is not needed. Connect the signal currentIndexChanged which sends a QString to the slot where you can update filterRegExp with this text as done earlier.

Also i want the text selected from combobox to filter this QSqlTableModel on the basis of another Column.

In that case you will need to override filterAcceptsColumn.

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On what basis should i do the segregation while overriding.
Sorry, I am unable to figure out!

p3c0

@Antweb That will need subclassing. Filtering by column can also be done by filterKeyColumn.
Here is a complete example. It is for QTreeView but can also be done for QTableView is the same way.

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I was able to do it with some simple signals and slots concept by resetting setFilterKeyColumn.
Complicating things further, is there a way to filter rows using the lineedit which have already been filtered once by the combobox?
Because right now it goes back to the original table and then filters!

p3c0

@Antweb Unfortunately I too do not know how to filter a already filtered list. May be someone else can answer this question. You can start a new topic explain this requirement.